package com.dst.utils;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.Reader;

public class MybatisUtils {
    private  static SqlSessionFactory sqlSessionFactory=null;
    private static ThreadLocal<SqlSession> tl = new ThreadLocal<SqlSession>();
    static {
        try {
            Reader reader = Resources.getResourceAsReader("mybatis-config.xml");
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    public static SqlSession getSqlSession(){
        SqlSession sqlSession = tl.get();
        if (sqlSession == null){
            sqlSession = sqlSessionFactory.openSession();
        }
        return sqlSession;
    }
    public static void closeSqlSession(){
        SqlSession sqlSession = tl.get();
        if(sqlSession != null){
           sqlSession.close();
           tl.remove();
       }
    }
}
